Electro-magnetic car-brake



(No Model.)

J. E. WITHERS 8: G. H. DELVIN.

ELBGTRO MAGNETIUGAR BRAKE. No. 306,452. Patented Oct. 14 1884.

u. PETERS. Plmlo-Lilhngmphnr. Washington, D c,

llhvirnn drarns arena? Unmet,

JAMES \VITI-IERS AND GEORGE II. DEL'VIN, OF HENDERSON, KENTUCKY.

ELECTRO ll/lAGNETlC CAR BRAKE.

SPECKPICATIDN forming part of Letters Patent No. 306,.i-52, dated Detober 1 188%.

Application filed February 18, 1884.

To (tZZ whom, it may concern:

Be it known that we, J A'MES EflVrrnnns and G-noncn H. DELVIN, citizens of the United States, residing at Henderson, in the county of Henderson and State of Kentucky, have invented certain new and useful Improvements in Electro-Magnetic Gar-Brakes, of which the following is a specification, reference being bad therein to the accompanying drawings.

Our invention has relation to electromagnetic car-brakes; and the object is to provide a simple and reliable form of brake for railroad-cars completely within the control of the engineer, and capable of being set or released instantly, as occasion requires; and the novelty consists in the construction of the same, as will be hereinafter more fully described, and particularly pointed out in the claims.

The figure in the drawing is a perspective view of our improved brake as it appears ap-' plied to a car.

A A is the car-floor laid upon the timbers B B.

O is a hanger secured to the timber B, and in its lower end is journaled the trunnion c of the frame D, while a similar hanger (not shown) provides a support for the opposite trunnion, c, of said frame. In this frame D, below the trunnions c c, is journaled a shaft, E, upon which is mounted a pulley, E, and one end of the chain G is likewise rigidly scoured to said shaft E, thence passing over the sheave H on shaft I, and then secured to the brake-lever K. The top of the frame D is provided with an arm, L, to which is secured one end of the pitman N, the other being connected to the U-shaped movable magnet-cores O, which slide freely in the helices I I By this construction it will be seen that if the helices I I are charged they become electro-magnets and draw the U-shaped core 0 inwardly, and the frame D being mounted in the trunnions c c, which form its fulcrum, as its top is drawn in by the action of the magnet, the pulley F is thrown into contact with the small friction-pulleyR. This causes the large pulley F to rotate and wind thechain G upon the shaft E, which operates the brake-lever K, and thereby sets the brakes.

S is a curved shoe, the rear end of which (No model.)

crank lever V, mounted upon the shaft I.

The longer arm of this lever has a pitman, \V, secured to the U-shaped core X sliding in the helices Y Y. The object of this co11- strnct-ion is to lock the brakes after they are set, which is accomplished by charging the helices Y Y, which draws the coreXinward, thereby forcing the shoe S against the pulley F, thereby rigidly locking it, and through it the brake-lever K when set.

2 represents a dynamo-maehine, and one wire, 3, runs to the switch-lever 4. The other wire, 5, is connected to the helices Y Y by the branch 6, thence through said helices and through the wire 7 to the left-hand switchpoint 8. From the right-hand switch-point, 9,

a wire, 10, runs through the helices I I and thence by the line 11 to the dynamo over the line 5. It will thus be seen that when the train is in motion, if the switch-lever 4 be moved to the right hand point, 9, the helices 7 5 P P will. be charged and the pulley F brought into contact with the friction-pulley It, which imparts motion to said pulley F, thereby winding the chain on the shaft E, and set thebrakelever 1i to lock the brakes on the train in this position. The switch-lever a is then moved to the left-hand point, 8,whicl1 releases the helices P I and their connected mechanism, but at the same instant charges the other pair of helices Y Y, thereby pressing the shoe S firmly against the large pulley E and retaining it in that position. To release the brakes entirely, the switch-lever at is moved to a cen tral position between the points 8 and 9, and

of course there is no circuit through either of 0 the magnets.

The small hub or friction-pulley B may be made in halves and secured upon the caraXle It by a key, r, and it is preferably made of any of the fibrous materials in common use. 5

Having thus fully described our invention, what we claim as new and useful, and desire to secure by Letters Patent of the United States, is-

1. In an elect-r0 -magnotic car-brake, the

helices P l U-shaped core 0, connecting- G, sheave H, and brake-lever K, and the fricrod N, frame D, mounted upon trunnions c c tion-hub R, rigidly secured to the car-axle It,

in hangers O, and provided with shaft E, pulas set forth.

ley F, and chain G, in combination with the In testimony whereof we affix ours'ignatures 5 friction-hub R and the brake-lever K, as and in presence of two witnesses.

for the purpose set forth. JAMES E. XVITHERS.

2. In an electro-magnetic.cairbrake, the GEORGE H. DELVIN. combination, with the helices Y Y, core X, pitman W, bell-crank lever V, connecting-rod IO U, and shoe S, of the shaft E, pulley F, chain 1 I \Vitnesses:

R. O. SOAPER, H. F. DADE, Jr. 

